Sole-trimming machine



W 1930 P; J. WENTWORTH 3,559

SOLE TRIMMI NG MACHINE Filed Dec. 17, 1926 s Sheets-Sheet '1'ditto-M4630 Aug. 19, 1930. PQJ. WENTWORTH 9 9 SOLE TRIMMING MACHI-NEFiled Dec. 17,1926 :ssheets-sneet 2 Aug. 19, 1930. R J WENTWORTH1,773,559

' SOLE TRIMMING MACHINE Filed Dec. 17'. 1926 s Sheets-Sheet s JTI mm 1MM W 4 o W y Patented mg. 19, -10?- PEARL WENTWORTH, OF FORT THOMAS,KENTUCKY SOLE-TRIMMING MACHINE Application filed December 17, 1926.Serial No. 155,520.

The invention relates to a machine for cutting or trimming a piece ofmaterial, as a leather stock used for shoe soles to a definite patternoutline, by a rapidly reciprocating 5 cutting tool moving against astationary anvil or plate surface upon which the work is supported.

The machine is primarily designed for cutting or trimming the heelportion of an outer sole for shoes preferably after it has been appliedor secured to the shoe upper to an outline corresponding to the outlineof the heel seat or to the shape or contour of the heel portion or alasted shoe upper and at a determined marginal distance or measurement1nwardly therefrom and for under or bevel cutting the edge to makeprovision for keying the outer sole into a recess or socket formed inthe top surface of a shoe heel, the trimming of the heel portion oftheouter sole 1n such fashion being for the purpose of following theprinciples in method and structure ,for securely applying a wooden heelto a shoe as made the subject matter of a separate appllcation filed byme November 18, 1926, Serial No. 149,234, for improvement in shoes.

It is therefore an object of the invent on to provide a machine forrapidly cutting leather or leather-like stock to a particular pattern oroutline along curved, irregular or other lines, and for marginallytrimming the heel portion of an outer sole of a shoe after it has beenapplied to the shoe upper to correspond to the configuration or contourof the heel portion of a lasted shoe upper with provision for utilizingthe lasted shoe upper as forming a gauge or pattern to which the sole istrimmed or adapting the sole to be guided along a row or line of tacksused in securing the sole to the upper. 7

Other objects relate to' the provision of gauging or guidinginstrumentalities actuated by the operator for varying the gauginginfluences while the operator is manually feeding the work to thecutter.

Other features and advantages of the invention relate to the provisionof an anvil or stationary plate cooperating with the movable cutterserving as a support and guide for the work and for making the necessaryrelative adjustment between anvil and cutter in relatively transversedirections, all of which will be more fully set forth in a descriptionof the accompanying drawings, in which:

Figure 1 is a side elevation of the machine.

Figure 2 is a front elevation thereof, omittingthe base or pedestalportion.

Figure 3 is an enlarged sections on line 33, Figure 2.

Figure 4 is a section on line 4-4, Figure 3. co

F igure 5 is a section on line 5-5, Figure 3.

Figure 6 is a perspective view of a wooden heel for shoes, recessed tointerlockingly receive the heel portion of an outer sole which 1noutline corresponds to the recess of the heel, and cut to such shape bythe machine of the present invention.

Figure 7 is a perspective view of the underside of the heel portion of ashoe with the heel portion of the outer sole trimmed to an outlinecorresponding to the outline of the recess of the heel, and representsthe work operated upon by the machine.

The machine is preferably shown and described for marginally trimmingthe heel portion of a shoe after it has been'applied to the upper asrepresenting the particular use of the machine from which its utilityand function can be more readily observed and its functions and mode ofoperation more readily understood, it being recognized that the machinecan be used for other purposes.

In its preferred capacity it is desirable to trim the heel portion ofthe outer sole to adapt the same to be engaged or socketed into awooden'heel for marginally securing the heel to the shoe and to practicean improved method of applying a wooden heel to a shoe to moresubstantially anchor the heel in position.

Referring to the drawings, 1 indicates a pedestal or base for supportingthe frame or body 2 secured upon the pedestal. The body in turn sustainsa journal head 3 of hollow construction to receive and house a pair ofpulleys, as an idler pulley 4 and a driven pulley 5, carried by theshaft 6 j ournalled in the head. The idler pulley 4 is loose upon theshaft 6, while the driven pulley 5 is fixed to the shaft. These pulleysare alternately engaged by a power transmitting belt 7, the belt beingshifted by a belt shifter comprising a yoke or fork 8 straddling thebelt and fixed upon the slide rod 9, the slide rod being supported inbearings integral with and extending from the head. The forward end ofthe slide rod is provided with a knob 10 for manually moving the yoke orfork to shift the belt from one pulley to the other. The body portion ofthe fork 8, at its lower side, is longitudinally grooved to engage aboutthe upper edge of a wall 11 as a part of the head to sustain the forkagainst rotative movement.

The forward side of the head is inclined and longitudinally grooved toprovide a dove-tailed wayfor a reciprocating slide bar 12, one wall ofthe groove being formed by gib plates 13 removably secured to the head.The slide bar 12 upon its lower side, is provided with a bearing block14 engaged into a recess formed in the head affording clearance forreciprocating the slide, the bearing block being engaged by a stud 15eccentrically extending from the forward end of the shaft 6, whereby theslide bar is reciprocated with the rotation of the shaft. The slide barat its lower end carries a cutting tool 16 adjustably clamped thereto bya bolt 17 The tool is micrometrically adjusted by a set screw 18 engagedin a bearing block 19 fixed upon the slide, and the set screw is lockedin its adjusted position by a lock screw 20 screw-threaded into thebearing block 19. The angular disposition of the slide results in thetool cutting through the work and forming an inclined or beveled edge,thus under-cutting the material while it is being trimmed to theappropriate outline.

The work operated upon by the cutter as shown in Figures 3 and 7 of thedrawings, represents the heel portion 21 of an outer sole preferablyafter it has been secured to the heel seat of a lasted shoe upper 22.The outer sole at the heel portion being secured to the heel seat of theshoe or to the inturned edge or margin of the shoe upper and inner sole23 by a row of tacks 24. The row of tacks are driven in a line followingthe heel contour of the upper, and thus form a pattern outline to whichthe heel portion of the outer sole is trimmed by the reciprocatingcutter 16. In trimming the undersole, the shoe is held by the operatorand presented to the machine by bringing and resting the margin of theheel portion of the outer sole on an anvil plate 25, having a knife edge27 to engage between the outer sole and heel seat margin of the uppersupporting the margin of the outer sole, and gauging the point at whichthe cutter 16 penetrates the outer sole, governed by the row of tackswhich limit the depth of the anvil insertion between the outer sole andshoe upper. The tool reciprocates at a comparatively high rate of speed,producing a very sharp cut edge to the leather material out, and the Theanvil is secured upon the upper end of a plunger rod 28 slidablysupported in bearings extending from the body 2 which are bored toreceive the rod. The lower end of the rod is pivotally connected to oneend of a connecting link 29, with the opposite end of the connectinglink pivotally connected to a foot treadle 3O pivoted to the base flangeof the pedestal. This permits the operator to control or regulate theelevation of the anvil by depressing or releasing the treadle with hisfoot, and also permits the anvil to be lowered for inserting the work.The plunger is sustained against rotative movement by a pin 31 securedin the projecting bearings of the body, and engaged through an elongatedslot 32 through the plunger rod. The anvil and plunger rod are limitedin the upper movement by a pair of lock nuts33 screwthreaded upon theplunger and moving within a notch or recess in the bearings of the body.Thus the elevation to which the anvil can be raised can be veryaccurately regulated relative to the cutting edge of the reciprocat: ingcutter.

As illustrated, the head is adjustably mounted upon the body, beingslidably engaged upon the top or table surface thereof, and adj ustablymoved by a screw 34 threaded into the head and bearing into a bracket orlug 35 extending upwardly from the body 2. This provides for amicrometric adjustment of the head for bringing the cutting edge of thetool in proper relation to the forward edge of the anvil, regulating thedistance for cutting from the guiding row of tacks and obtaining thedesired heel seat margin between the cut edge of the outer sole and heelseat edge of the shoe upper. This result also can be obtained by makingthe anvil adjustable or interchanging it with other sizes although themethod employed is preferable as it offers simplicity and rigidity instructure.

The work is further guided in relation to the cutter by a movable restmember 36 arranged to engage with the contour surface of the shoe upperbelow the anvil. The rest member is movably mounted so as to enable theoperator to regulate the same at will while feeding the work to thecutter and structurally is formed with a vertically disposed shankportion having its upper end rounded or curved and slightly offset toobtain a line contact against the shoe surface. A line or edge contactfacilitates in feeding or guiding the work more accurately to thecontour of the shoe for cutting the work or outer sole correspondinglyto such outline or shoe contour. The shank portion extends from and atan angle to a U-shaped body portion 37 which is slidably mounted uponthe bearing extensions of the machine body 2 by screws 38 extendingthrough an elongated slot in the rest body portion 37. The body isformed to provide a finger hold 39 enabling the rest member to begrasped by a finger of the operator and manipulated while holding thework to the action of the cutter. The degree of sliding movement of therest member is governed or limited by a screw 40 fixed to themachineframe and extending througha cross .wall of the body portion of the restmember, the cross wall being between the head of the screw and a set nut41. The rest member is sustained in a retracted position by a spring 42connected with the rest member and machine frame.

Having described my invention, I claim:

1. In a machine for marginally trimming the heel portion of an outersole after the outer sole is applied to the shoe upper, comprising, ahead stock, a slide carrying a cutter tool mounted for reciprocationupon said head stock, means carried by the head stock for reciprocatinsaid slide, an anvil depressibly mounted %eneath the cutter againstwhich the cutter operates for trimming the work supported upon theanvil, the anvil having an edge adapted to be tucked between the heelseat of the upper and outer sole and against'the fastening elementssecuring the sole to the upper for guiding the work during the trimmingand thereby govern the line of trim, and adjustable stop means forlimiting the elevation of the anvil relative to the cutting edge of thecutter.

2. In a machine for marginally trimming the heel portion of an outersole after the outer sole is applied to the shoe upper, comprising, ahead stock, a cutter tool mounted for reciprocation upon said headstock, means carried by the head stock for reciprocating said cutter, ananvil mounted beneath the cutter against which the cutter operates fortrimming the Work supported upon the anvil, and a rest member mountedupon said head stock adapted to bear against the heel portion of theupper for guiding the work for correspondingly trimming the same to thecontour of said upper heel portion, said rest member having an extensionadjacent the shoe for manipulating the rest by the hand manipulating theshoe, whereby the rest is moved for varying the cutting pattern.

In witness whereof, I hereunto subscribe my name.

PEARL J. WENTWORTH.

